JPH0439876Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to an excavation device for a bucket hoe for digging side ditches with a bucket.

(B) Prior Art Conventionally, as shown in Fig. 4, in a bucket hoe, a bucket belt 4 is rotatably connected to the tip side of a bucket arm 2 connected to a boom by a bucket cylinder 3. The bucket cylinder 3 is connected to the rear bracket 5 of the bucket 4 via an interlocking link 6, and the upper side of the bracket 5 is rotatably connected to the tip of the bucket arm 2 via a support shaft 10. It had a connected structure.

(c) Problems that the invention aims to solve Therefore, as shown in Figure 4, Bucket 4
Since the bucket rotates around the support shaft 10, the tip of the bucket 4 excavates in an arc of radius R, and while the machine moves backward, it can continuously excavate, for example, a side ditch for a U-shaped maintenance facility. In such cases, as shown by the imaginary line, the bottom surface of the gutter becomes uneven in the form of waves, resulting in an excavated condition that requires time and effort for post-processing.

(d) Means for solving the problem The present invention is designed to enable efficient excavation without requiring such troublesome post-processing. A connecting shaft that communicates with the bucket via an interlocking link is pivotally attached to the lower side of the bracket, and a support section installed on the upper side of the bracket near the connecting shaft is attached to the tip of the bucket arm. It is configured to be slidably fitted into a formed elongated hole.

(E) Effect Therefore, when the bucket cylinder is extended and the bucket excavates while rotating around the support shaft, the support shaft slides along the long hole at the tip of the bucket arm. In such a sliding state, the bucket moves horizontally,
This means that the bottom surface of the side ditch can be excavated horizontally without becoming wavy and uneven as in the conventional method.

(F) Embodiment Next, the embodiment shown in FIGS. 1 to 3 will be described.

FIG. 3 shows a side view of the entire backhoe, with an earth removal plate 12 extending forward from between both crawlers 11,
A cab 15 equipped with a cabin 13 and an engine section 14 is rotatably installed above between both crawlers 11, and a boom cylinder 17 is connected to a bracket 16 erected at the front of the cab 15. The base of the equipped boom 1 is pivotally attached to the tip of the boom 1, and the upper part of the bucket arm 2 is pivotally attached to the tip of the boom 1 via an arm cylinder 18. The bucket cylinder 3 is attached to the upper part of the bucket arm 2. The bucket belt 4 is connected to the base of the bucket arm 2, and a bucket belt 4 can be connected to the bottom end of the bucket arm 2, so that the bucket belt arm 2 is constructed in the same manner as the conventional structure.

Two brackets 5, 5 are integrally fixed in parallel to the rear outer surface of the bucket cart 4 having a group of claws 4a at the tip thereof, and both links 19 have one end pivoted to the lower side of the bucket cart arm 2. The tip of the piston rod 3a of the bucket cylinder 3 is connected to the tip of the bracket 5, and the other end of the arc-shaped interlocking link 6 is connected to the connecting shaft 7 pivoted to the lower side of the brackets 5, 5. It is connected to the tip of the piston rod 3a and the tips of both links 19.

Parallel arm plates 2a are extended from the tip of the bucket arm 2, and parallel elongated holes are provided in both arm plates 2a, which are inclined at an angle greater than 90 degrees with respect to the extending direction of the bucket arm 2. 9, and both brackets 5 are located near the connecting shaft 7.
Both support shafts 8 of the roller mounted on the upper side of the roller with the same axis are slidably fitted into both elongated holes 9, and both support shafts 8 with large diameters are provided on the outside of both support shafts 8. The plates 8a are each mounted on an axis.

Therefore, when excavating a side ditch for burying a U-shaped pipe, for example, excavation can be carried out by moving the bucket arm 2 up and down or rotating the bucket 4 while moving the machine backwards. However, when excavating while rotating the bucket 4 in a side ditch, the piston rod 3a extends as shown by arrow A from the state shown in FIG. 1, and both links 1
When both the interlocking links 6 are pushed while rotating the bucket 9, the supporting parts 8 move inside the long holes 9 as shown by the arrows B, and the bucket 4 remains in an upright position and rotates greatly. Instead of moving, the gutter will move horizontally from the solid line state to the imaginary line state as shown by arrow C, and as a result, the bottom surface of the gutter will be in a nearly flat state to prevent the wavy unevenness that occurs in the past. It will eventually be excavated.

(g) Effect of the invention As described above, in the present invention, when excavating a side ditch or the like while extending the bucket cylinder 3 and rotating the bucket 4, the support part 8 connects to the elongated hole 9 on the tip side of the bucket arm 2. During the sliding movement, the bucket 4 moves in the horizontal direction without rotating significantly, so the bottom surface of the gutter etc. does not become uneven in a wavy shape as in the past, but becomes flat. Since the excavation can be carried out in a short distance, the excavation work can be carried out in a good manner without the need for troublesome post-processing as in the conventional method.

[Brief explanation of the drawing]

Figure 1 is a side view of the main parts of an embodiment of the present invention;
FIG. 2 is a sectional view of a part thereof, FIG. 3 is a side view of the entire backhoe, and FIG. 4 is a side view of a conventional example. 1...boom, 2...bucket arm, 3...
Bucket cylinder, 4...Bucket, 5...Bracket, 6...Interlocking link, 7...Connection shaft, 8...
...Spindle part, 9...Long hole.

Claims (1)

[Scope of utility model registration request] In a bucket hoe constructed by connecting a bucket truck 4 rotatably to the tip side of a bucket truck arm 2 connected to a boom 1, a bucket truck 4 is rotatably connected to the tip side of a bucket truck arm 2 connected to a boom 1. A connecting shaft 7 connected to the bucket cylinder 3 via an interlocking ring 6 is pivotally mounted on the side, and a support shaft 8 installed on the upper side of the bracket 5 near the connecting shaft 7 is attached to the bucket cylinder 3. An excavating device for a backhoe, characterized in that it is configured to be slidably fitted into a long hole 9 formed on the tip side of a toe arm 2.